US4380223A - Liquid fuel injection pumping apparatus - Google Patents

Liquid fuel injection pumping apparatus Download PDF

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Publication number
US4380223A
US4380223A US06/230,270 US23027081A US4380223A US 4380223 A US4380223 A US 4380223A US 23027081 A US23027081 A US 23027081A US 4380223 A US4380223 A US 4380223A
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US
United States
Prior art keywords
pressure
valve
engine
restrictor
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/230,270
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English (en)
Inventor
John R. Jefferson
Robert T. J. Skinner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Assigned to LUCAS INDUSTRIES LIMITED reassignment LUCAS INDUSTRIES LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JEFFERSON JOHN R., SKINNER ROBERT T. J.
Application filed by Lucas Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US4380223A publication Critical patent/US4380223A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
    • F02D1/065—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid of intake of air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
    • F02M41/1405—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
    • F02M41/1411—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection timing

Definitions

  • This invention relates to a liquid fuel injection pumping apparatus for supplying fuel to a turbo super-charged compression ignition engine and of the kind comprising a housing, a rotary distributor member located in the housing and adapted in use, to be driven in timed relationship with an associated engine, a reciprocable pump plunger located in a bore in the distributor member, a cam located in the housing for imparting inward movement to the plunger as the distributor member rotates, means for feeding fuel to the bore to effect outward movement of the plunger, passage means for conveying fuel from the bore to an outlet during inward movement of the plunger, a movable member operable in use to determine the maximum outward movement of the plunger and means responsive to the pressure of air delivered to the associated engine in use, for determining the setting of said movable member.
  • the object of the present invention is to provide an apparatus of the kind specified in a simple and convenient form.
  • said pressure responsive means comprises a piston housed within a cylinder, means coupling said piston to said movable member, a source of liquid under pressure, a conduit connecting said source to said cylinder and valve means operable to control the liquid pressure in said cylinder, said valve means in use being responsive to the pressure of air supplied to the associated engine.
  • FIG. 1 is a diagrammatic sectional side elevation of the apparatus
  • FIG. 2 is a diagram of the cam lobe profile and a profile of a stop ring forming part of the apparatus of FIG. 1,
  • FIG. 3 is a part sectional side elevation showing part of a practical construction of the apparatus of FIG. 1.
  • the apparatus comprises a multi-part housing 10 in which is mounted a rotary cylindrical distributor member 11.
  • the distributor member has an enlarged portion 12 which is driven from a drive shaft 13 the latter in use being driven in timed relationship with the associated engine.
  • Formed in the distributor member 11 is a diametrically disposed bore 14 in which is mounted a pair of plungers 15 which at their outer ends, engage shoes 16 respectively which carry rollers 17 for engagement with the internal peripheral surface of an annular ring 18 surrounding the enlarged portion 12 of the distributor member.
  • the cam ring 18 has a plurality of inwardly extending cam lobes the profile of one of which is seen at 20 in FIG. 2.
  • the shoes 16 are carried in slots formed in a sleeve 19 which is secured to or forms part of the drive shaft 13.
  • a longitudinal passage 21 which at one end communicates with a radially disposed delivery passage 22.
  • the passage 22 is disposed to register in turn with outlet ports 23 formed in the body and connected in use to the injection nozzles respectively of the associated engine.
  • the longitudinal passage 21 also communicates with a plurality of inlet passages 24 which are formed in the distributor member and which are arranged to communicate in turn with an inlet port 25 which is formed in the housing 10.
  • the inlet port 25 communicates by way of a fuel control device 26 conveniently comprising an adjustable throttle, with a fuel supply passage 27.
  • This passage communicates with the outlet of a low pressure supply pump the rotary part of which is carried by the distributor member.
  • the low pressure pump draws fuel through an inlet 28 and conveniently a relief valve is provided whereby the outlet pressure of the low pressure pump is controlled in a manner so that it varies in accordance with the speed at which the apparatus is driven.
  • a pair of stop rings 29, these rings are disposed on opposite sides of the cam ring 18 and are angularly movable within the housing. They have an internal profile as shown at 30 in FIG. 2.
  • the stop rings are interconnected by means of a bridging member 31 which is provided with an up-standing projection 32. As will be explained, the projection 32 can be moved to the dotted position shown in FIG. 3 and during such movement angular movement will be imparted to the rings 29.
  • each cam lobe has a leading flank 37 which when the roller is engaged therewith, will effect inward movement of the rollers and plungers, a crest portion which is followed by a dwell portion 38 and a further dwell portion 39.
  • the rollers ride over the crest, no more fuel is displaced to the engine and the limited outward movement of the rollers before they engage the dwell 38, permits the delivery valves of the apparatus and also the valves in the injection nozzles, to close.
  • the delivery passage 22 moves out of register with an outlet 23 and this is followed by an inlet passage 24 moving into register with the inlet 25.
  • the position at which an inlet passage is moved out of register with the inlet port is indicated at 40.
  • the stop rings 30 have an internal profile which includes an outwardly extending portion 41 and the portion 41 acts to limit the extent of outward movement of the rollers and hence the plungers. It will be noted that the rollers and plungers can still move outwardly up to the position at which the inlet passage moves out of register with the inlet port but when this communication is broken no further outward movement, at least of the plungers, can take place. Moreover, it should be noted that there may be conditions of engine operation when the rollers do not engage the portion 41 for example, when the fuel control device is more or less closed.
  • a piston 42 is provided which is housed within a cylinder 43 secured on one side of the housing 10 of the apparatus.
  • the housing also supports a bush 44 and extending through the bush is a bore in which is located a push rod 45.
  • the push rod 45 is engaged at one end with the piston 42 and at its other end with the projection 32.
  • the piston 42 is biassed towards one end of the cylinder 43 by means of a coiled compression spring 46.
  • Liquid under pressure is delivered to the aforesaid one end of the cylinder 43 by way of a conduit 47.
  • the source of liquid under pressure is the low pressure pump which supplies fuel to the passage 27.
  • the conduit 47 incorporates a fixed restrictor 48 and downstream of the restrictor 48 the conduit 47 communicates with a branch conduit 49 which opens into a chamber.
  • the end of the conduit 49 in the chamber defines a seating for a ball 50 and the chamber communicates with a drain conveniently a space within the housing of the apparatus.
  • the ball 50 is engaged by a projection carried by a plate 51 and the plate 51 is biassed by a spring 52 in such a manner that the ball 50 is urged onto the seating.
  • the plate 51 is subject, in use, to the outlet pressure of the turbo super-charger in a manner such that the pressure of air developed by the turbo super-charger assists the action of the spring 52 in biassing the ball 50 into contact with its seating.
  • a flexible cup-shaped member 53 is provided having an outwardly extending flange portion which is retained between two parts of the housing.
  • the interior of the cup-shaped member is exposed to the pressure of air supplied to the engine by way of a passage formed in a suitable connector 54 and which is connected to the inlet manifold of the associated engine.
  • the aforesaid passage includes a non-return valve generally indicated at 55 the purpose of which is to prevent the flow of fuel towards the inlet manifold of the engine in the event of rupture of the member 53.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)
US06/230,270 1980-02-14 1981-01-30 Liquid fuel injection pumping apparatus Expired - Fee Related US4380223A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8004951 1980-02-14
GB8004951 1980-02-14

Publications (1)

Publication Number Publication Date
US4380223A true US4380223A (en) 1983-04-19

Family

ID=10511338

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/230,270 Expired - Fee Related US4380223A (en) 1980-02-14 1981-01-30 Liquid fuel injection pumping apparatus

Country Status (6)

Country Link
US (1) US4380223A (enrdf_load_stackoverflow)
JP (1) JPS56129753A (enrdf_load_stackoverflow)
ES (1) ES499216A0 (enrdf_load_stackoverflow)
FR (1) FR2476224B1 (enrdf_load_stackoverflow)
GB (1) GB2070134B (enrdf_load_stackoverflow)
IT (1) IT1135466B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003540A1 (en) * 1983-03-04 1984-09-13 Stanadyne Inc Fuel injection pump with plunger stroke control
US4844033A (en) * 1987-02-13 1989-07-04 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US4903661A (en) * 1987-08-08 1990-02-27 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US4909216A (en) * 1986-12-12 1990-03-20 Mtu Friedrichshafen Gmbh Regulating arrangement of a fuel-injection pump with a lever
US5218940A (en) * 1991-03-22 1993-06-15 Navistar International Transportation Corp. Aneroid boost modulator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3137145A1 (de) * 1981-09-18 1983-04-07 Robert Bosch Gmbh, 7000 Stuttgart Ladedruckabhaengige steuereinrichtung fuer aufgeladene einspritzbrennkraftmaschinen, insbesondere fuer fahrzeug-dieselmotoren
GB8717326D0 (en) * 1987-07-22 1987-08-26 Lucas Ind Plc Fuel pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050437A (en) * 1975-04-01 1977-09-27 Cav Limited Liquid fuel injection pumping apparatus
US4154204A (en) * 1976-08-09 1979-05-15 Cav Rotodiesel Fuel injection pump responsive to an engine's intake air pressure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1321367A (fr) * 1962-05-08 1963-03-15 Cav Ltd Pompe à combustible liquide pour moteurs à combustion interne

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050437A (en) * 1975-04-01 1977-09-27 Cav Limited Liquid fuel injection pumping apparatus
US4154204A (en) * 1976-08-09 1979-05-15 Cav Rotodiesel Fuel injection pump responsive to an engine's intake air pressure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003540A1 (en) * 1983-03-04 1984-09-13 Stanadyne Inc Fuel injection pump with plunger stroke control
US4909216A (en) * 1986-12-12 1990-03-20 Mtu Friedrichshafen Gmbh Regulating arrangement of a fuel-injection pump with a lever
US4844033A (en) * 1987-02-13 1989-07-04 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US4903661A (en) * 1987-08-08 1990-02-27 Lucas Industries Public Limited Company Fuel injection pumping apparatus
US5218940A (en) * 1991-03-22 1993-06-15 Navistar International Transportation Corp. Aneroid boost modulator

Also Published As

Publication number Publication date
IT1135466B (it) 1986-08-20
GB2070134A (en) 1981-09-03
FR2476224B1 (fr) 1985-09-27
JPS56129753A (en) 1981-10-12
IT8119742A0 (it) 1981-02-13
FR2476224A1 (fr) 1981-08-21
GB2070134B (en) 1983-08-17
ES8205946A1 (es) 1982-06-16
JPS6411824B2 (enrdf_load_stackoverflow) 1989-02-27
ES499216A0 (es) 1982-06-16

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